J o h n m



(No Model.)

J. McSPIRIT.

PICK ATTACHMENT FOR DRBDGE BUGKETS.

. Patented Aug. 18, 1885.

WITNESSES ATTORNEYS.

UNITED STATES PATENT OFFICE.

JOHN MLSPIRIT, OF JERSEY CITY, NEW JERSEY.

PICK ATTACHMENT FOR DREDGE-BUCKETS.

QI ECIPICATION forming part of Letters Patent No. 324,573, dated August 18, 1885.

Application lilell June F, 13%.

To a]! whom it may concern.-

Be it known that 1, Joan )IeSrnaruol Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Pick Attachments for Dredge-Buckets, of which the following is a full, clear, and exact description.

Reference is to behad to the accompanying drawings, forming part of this specification, in which similar letters of rcfcrenceindicate corresponding parts in all the figures.

Figure 1 is a side elevation of a dredgebuckct to which my improved attachment has been applied. Fig. 2 is a front elevation ofthe same. Fig. 3 is a side elevation of the same arranged for use as adredge-bucket.

The object of this invention is to provide pick attachments for dredge-buckets forloosening hard ground, so that it can be grasped and raised by the dredge-buckets, and which shall be constructed in such a manner that they can be readily turned up out of the way when the buckets are to be used for drcdgin".

The invention consists in the combination of the parts of theattachment with the frame of the dredge-bucket, as will be hereinafter fully described and then claimed.

A is the frame of the dredge-bucket. To the lower ends of the side bars of the frame A are pivoted lugs formed upon the inner corners of the buckets B.

To the ends of the buckets B, near their outer corners, are pivoted the lower ends of the connecting-bars (I l), the upper ends of which are pivoted to the corners of the wide ends of the le vcrs E by cross-bars F l. The levers E at one side of their middle parts are pivoted by a round, H, to projections formed upon the middle parts of one side edge of the side bars of the frame A. The narrow ends of the levers E are curved toward each other and are connected by a short rod, I, to which or to a pulley attached to it is attached the end of the hoistingchain J. The hoistingchain J passes around the rod K, connecting the corners of the upper ends of the side bars of the frame A, and passes thence to the derrick-arm.

To the crossbar F of the levers E, or to a pulley attached to the said crossbar, is attached the end of the lowering-chain T). which passes {Xe model.)

around the crossbar G, or a pulley placed upon the said cross bar passes around the cross bar ltl ronnecting the other corners of the up perends of the side bars of the frame A, or a pulley placed upon the said crossbar M, and passes thence to the derrick-arm.

\Vith this construction the first effcctoftension upon the chain J, by means of which the dredge-buckets are raised, is to close the said buckets and the first effect oftension upon the chain L, by means of which the dredge-buck cts are lowered, is to open the said buckets, each chain being always slackcned when the other is drawn upon.

As thus far described there is nothing new in the construction.

To the ends of the cross-bar N that connects the lower ends of the side bars of the frame A are pivoted the upper ends of two picks, O, which are connected a little below the buckets 'B, when closed, by a crossbar, l. The picks O are made large and heavy, and their lower ends are tapered to a point, as shown in Figs. 1 and 2.

\Vhen the picks are not in use, they are turned into an upwardly-inclined position, and are secured in said position by a hook, Q, pivoted to one ot the sidebars of the frame A, and hooked upon one of the picks O, as shown in Fig. 3.

\Vhen using the dredge-bucket as a pick, it is lowered by means of the hoisting-chain .1, so that the buckets I; will be held closed, and the weight of the said bucket forces the picks into the hard ground at the bottom of the water,and as the chain J continues to slackcn the weight ofthe bucket pulls the picks 1) over sidcwisc, and thus loosens the ground. The bucket then raised for a little distance, moved a little to one side, and again lowered to loosen some more of the ground, and so on. \Vhen a sufficient quant ity of ground has been loosened, the dredgebucket is raised,the picks O are swung up and secured by the hook Q, and the drcdgebuckct is used in the ordinary manner for raising the ground loosened bylhe picks O.

Hating thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- l. The combination, with the frame A of a ICO dru'ige-buckut, of the pivoted picks 0 and their connecting-bur I, substantially as herein shown and deseribed,whereby adredg'ebuek et can be used as :1 pick to loosen hard ground at the bottom of water, as set forth.

2. The combination, with the frame A of a dredge-bucket, and the picks O, pivoted to the said frame, of the hook Q, substantially as herein shown and described, whereby the said pie-ks can besupport ed out oi'the way when 10 not required for use, as set forth.

.HHIN )IVSPIRTT.

\Vitnesses:

J OSEPH \VARREN, THOMAS SHURTELL. 

